Apparatus for measuring the flow of liquids



C. BROWN;

APPARATUS FOR MEASURING THE FLOW 0F LIQUIDS.

APPLICATION FILED DEC. 18. 1917.

1,347, 143. Patented July 20, 1920.

III

CLEMENT BROWN, OF BIRMINGHAM, ENGLAND.

APPARATUS FOR MEASURING THE FLOW OF LIQIJ'IDS.

Application filed December 18, 1917.

To all whom it may concern:

Be it known that I, CLEMENT BRoWN, a subject of the Kingdom of Great Britain, residing at 19 Trinity road, Birchfield, Birmingham, lVarwickshire, England, have invented certain new and useful Improvements in or Relating to Apparatus for Measuring the Flow of Liquids, of which the following is a specification.

This invention comprises certain improvements in or relating to apparatus for measuring the flow of liquids.

practice, reference may be had to the ap-.

According to the present invention, the liquid is supplied under a suitable head to a calibrated orifice through which it is adapted to flow. Beyond this orifice the conduit containing the liquid is bifurcated; one conduit of the bifurcation extends upwardly, while the other conduit is adapted to'convey the fluid to be measured. liquid rises in the first-mentioned bifurcation according to the quantity of liquid flowing per unit time through the other bifurcation.

In order that this invention may be clearly understood and readily carried into pended explanatory sheet of drawings, upon which I Figure 1 is a front elevation of an apparatus according to the present invention.

Fig. 2 is a side elevation of the apparatus shown in Fig. 1 withan additional apparatus hereinafter described applied thereto.

Fig. 3 is an enlarged partly sectional elevation of one of the cooks shown in Fig. 1, illustrating the utilization of the apparatus for ascertaining the size of an orifice.

In a convenient embodiment of the present invention, the apparatus involves a vertical tube a which may be fitted at the top with a float or other constant level supply chamber. This vertical tube has a lateral extension 0 at its lower extremity, and from said lateral extension a glass tube (5 extends upwardly to a point above the liquid level of the float chamber I). Between the tube associated with the float chamber and the glass tube in the connecting conduit, a constriction or calibrated orifice e is provided.

. Below the glass conduit a conduit 7 extends downwardly, in which conduit a cook or valve 9 may be provided. This downwardly extending conduit may be placed in communication with the apparatus in which the liquid is used. Alternatively a jet or Specification of Letters Patent.

The

Patented July 20,1920. Serial No. 207,701.

orifice may be assembled in relation to this outlet. The flow of fluid through this orifice, and thus the size of the orifice, can be ascertained. In relation to the glass tube a graduated scale it may be fixed adapted to indicate the rate of flow or quantity per unit time measured by the apparatus.

A second bifurcation imay extend from the lateralextension c ofthe' supply tube,

and said second bifurcation may terminate witha calibrated orifice. to this calibrated orifice may be controlled by a cock j. This orifice is of known capacity and by allowing the liquid to flow through it the graduated scale it which is adjustable, may be affixed in a precisely correct position in relation to the glass tube for subsequent measurement. 'The conditions of measurement are liable to vary as a result of temperature, atmospheric conditions, etc, hence the desideratum of correctly 10- eating the graduated scale periodically.

. On the egress side of the cock 9 through which the liquid to be measured normally passes, provision may be incorporated releasing any air which may be confined below the cock. This provision may, for instance, comprise an air egress opening which is controlled by a suitable valve it. Before opening the cock which delivers the liquid to be measured, it is desirable to open this valve. The cock 9 is then opened and the air release valve 7c subsequently closed after any air has escaped.

In connection with a single float chamber 7) and tube a descending therefrom, the ap paratus above described may be duplicated. Thus the supply tube 5 from the float chamber may at its lower extremity branch with two or more lateral conduits c, in each of which a calibrated orifice e is provided, beyond which the bifurcations for indication and delivery are provided. The calibrated orifices in the several branches may be identical, or they may differ.

The invention may, for instance, be utilized for measuring the quantity of liquid fuel delivered to an internal-combustion engme. For this purpose the delivery conduit may extend from the delivery cock 9 to a carbureter with or without a float chamber. In case the method of utilization of the liquid should be of such an intermittent or other character as to result in a continued or substantially continued alternating movement of the level in the indicator tube, I

The flow of liquid for may provide between the delivery cock 9 and the apparatus at which the liquld is used, an air chamber Z. The conduit p from the delivery cock may enter this air chamber at one level, which may be suitably below the top, and an outletrm from said chamber may be provided at a lower levelliver-y cock may be adapted to receive an.

adapter a into which the jet 0 may be screwed The liquid may then be allowed to flow through the jet and the rate of flow ascertained.

The operation ofthe device is as follows: Liquid from the constant level chamber Z2 descends by way of the tube 0, and then flows rapidly'through calibrated-orifice e'.

Thereafter the liquid egresses through the cock 9. As the liquid passes from the orifice a to cock g, it rises in the tube (Z, and

the extent to which it rises in this tube depends upon the rate of egress by way of cock g. To adapt the apparatus to measurements, to variable temperatures and atmospheric conditions, the test outlet of known capacity is opened and a scale it is v, adjusted inv accordance with therate of flow temperature conditions. 40

thus established for the particular air and I As indicated before, the air confined below cock 9 is released by opening the valve is.

What If claim as my invention and de:

sire to secure by Letters Patent-is 7 1. Apparatus for measuring the flow of liquids, including a constant level chamber,

a supply conduit descending therefrom, a

trii'urcation forming the terminal of said conduit andcommunicating wlth said conof flow under duit through a calibrated orifice, a vertically extending tube rising from one branch of said trifurcation, an outlet pipe secured to the second branch, and a test outletsecured to the third branch of said trifurcation, said test outlet having a calibrated orifice and permitting. discernment of a particular rate varying temperature conditions. I

2. Apparatus for measuring the flow of liquids, including a constant level chamber, a supply conduit descending therefrom, a trifurcation forming the terminal: "of said conduit and communicating therewith through a calibrated orifice, a vertical glass tube rising from one branch of said trifurcation, an adjustable graduated scale ar ranged in proper position relative to said glass tube, an outlet pipe secured to the second branch, and a test outlet secured .to'the third branch of said trifurca-tion, said test outlet having a calibrated orifice ofknown capacity, said graduated scale being theoretically arranged in accordance with the rate of flow obtained through said test outlet; i i v V r 3. Apparatus formeasuring'the flow of liquids, includinga constant level chamber, a supply conduit descending therefrom, a 'trifurcation forming the terminal of said conduit and communicating with said conduit through a calibrated orifice, a vertically extending conduit rising-from one'branch of said trifurcation, an outlet pipe secured to the second branch having acock, a vent for said outlet pipe arranged below said cock, and a test outlet secured to the third branch ofsaid trifurcation, said test outlet having a calibrated orifice and permitting the discernment of the particular rate of flow under varying temperature conditions.

In witness whereof I have hereunto set my hand in the presence of two witnesses.

. CLEMENT BROWN.

Witnesses: V

A HUR H. BROWN, Eneiui WVHEE E 

